12211557652 has 24 divisors (see below), whose sum is σ = 24425890496. Its totient is φ = 5232930048.

The previous prime is 12211557637. The next prime is 12211557661. The reversal of 12211557652 is 25675511221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301348 + ... + 339460.

Almost surely, 2^12211557652 is an apocalyptic number.

It is an amenable number.

12211557652 is an abundant number, since it is smaller than the sum of its proper divisors (12214332844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12211557652 is a wasteful number, since it uses less digits than its factorization.

12211557652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49567 (or 49565 counting only the distinct ones).

The product of its digits is 42000, while the sum is 37.

The spelling of 12211557652 in words is "twelve billion, two hundred eleven million, five hundred fifty-seven thousand, six hundred fifty-two".